Corporation stopcock



Sept. 7 1926.

W. J. MIX

CORPORATION STOPCOCK Filed Oct. 1'7, I925 w CN Patented Sept. 7, 1926.

-UN ITED STATES 1,599,098 PATENT OFFICE.

WILLIAM .1. MIX, 0E DECATUR, ILLINOIS,- ASSIGNOR TO ADoLPH MUELLER, TRUSTEE, OF DECATUR, ILLINOIS.

CORPORATION STOPCOCK. 1

to utilize a tool, which engages the threaded outlet nipple of the cock, and by rotation engages the thread on the inlet nipple with a thread previously cut in the wall of the mam.

The exterior face of the cock body, adj acent the base of the outlet nipple, is of tapering form, and, as commonly constructed, there is no means for postively limiting the extent to which the tool employed for attaching the stop cock to the main can move toward the body. Therefore, it is possible for such tool to be tightly wedged onto the tapered surface surrounding the base of the outlet nipple, making itdifiicult to detach the tool after the cock has been applied to the main.

The object of the present invention is to provide a corporation stop cock with means by which any danger of the applying machine or tool being undesirably jammed or wedged upon the cock while itis being attached to the main will be avoided.

In the drawings Figure 1 is a side elevation of a corporation stop cock constructed in accordance with the present invention, a portion of a main and of a part of an attaching machine, or tool, commonly employed for attaching the cock to the main being shown in dotted lines.

Figure 2 is a vertical section substantially on the line 2-2 of Figure 1.

Figure 3 is a horizontal section substantially on the line 3--3 of Figure 1, and

Figure 4 is a vertical section substantially on the line 4-4 of Figure 2.

Referring to the drawing. in the several figures of which like parts are designated by the same reference characters, A designate:- the body of the corporation stop cock, which, as usual. is provided with the exteriorly threaded inlet and outlet nipples B, C. The

body A is provided with the usual tapering passage for a tubular plug key D by which flow of fluid through the cock is controlled, such key having a head or rib Eat one end, by which it may be turned, and being secured in position by a nut F atfixed on its stem in the usual manner.

At diametrically opposite points, the body A of the stop cock is provided with outwardly projecting lugs G, the upper faces of which are flat and in planes at right angles to the vertical plane of the axis of the cock passage.

The upper surfaces of the lugs G constitute abutments. against which the lower end of the tool H that is employed for applying the cock to a main I will bear when in working relation to the cock.

It will be seen that the lugs G are of such height that when the end of the tool H is in contact therewith, it will securely engage the thread on the outlet nipple C, but will be positively prevented from being crowded down on or wedged upon the inclined exterior surface K of the 'cock body.

The thread on the outlet nipple, it will be noted. does not extend to the free end there of, but is separated from such end by a convex ground surface so that a ball joint is provided between said nipple and the pipe section engaged therewith.

As shown clearly in Figure 4, the lugs G also positively prevent contact of the tool H with the ground surface about the outer end ofthe outlet nipple which might crush said end so as to interfere with free flow therethrough or mar the exterior surface so as to prevent proper close contact with the pipe sectionand consequent liability of leakage.

Preferably, two lugs G are provided, these. as shown, being located at diametrically opposite points. It is possible that a single lug would fulfill some of the purposes of the invention, or that the number of such lugs might be, in some instances, increased. However, two, arranged as shown, have been found to be very efiicient.

The area of contact between the end of the tool H and the faces of the lugs G is such that but slight resistance is offered to the turning of the tool H to disconnect it from the outlet nipple C. If the cork were provided with a [tat surface extending continuously about the base of the outlet nipple, the area of contact between such surface and the end of the tool H would be so great that there would be danger of the cock being bodily turned in the main when the tool was being reversed to disconnect it from the nipple C, and this would loosen, to some degree, the connection of the inlet nipple B with the main.

It is believed that the advantages of the improvements will be readily understood, from the foregoing description and the drawings. The lugs G, of course, would be cast integral with the body A, and the flat faces thereof shaped to provide a smooth contact surface for'the end of the implement H.

In the drawing, and referring particularly to Figure 1, the several parts are shown in the relations occupied while the stop cock is being screwed into the main and prior to the completion of the attachment of thecock to the main.

Having thus described the invention, what is claimed is 1. A corporation stop comprising a body provided with externally threaded inlet and outlet nipples and an abutment adapted to prevent a tool engaging the thread on the outlet nipple while applying the stop to a main from becoming wedged onto the stop body or contacting with the outer end of the outlet nipple, and a rotatable plug key cont-rolling flow from the inlet to the outlet nipple.

2. A corporation stop comprising a body provided with externally threaded inlet and outlet nipples, the thread on the outlet nipple being separated from the outer end of the nipple by an annular convex ground surface, and an abutment adapted to prevent a tool engaging the thread on the outlet nipple While applying the stop to a main from becoming wedged onto the stop body or contacting with said convex ground surface at the outer end of said nipple, and a rotatable plug key controlling flow from the inlet to the outlet nipple.

3. A corporation stop comprising a body provided with externally threaded inlet and outlet nipples and a rotatable plug key for controlling flow through the stop, the body being provided substantially at the base of the outlet nipple with a plurality of circumferentially spaced lugs having their faces extending substantially at right angles to the axis of the outlet nipple and constituting abutments adapted to limit movement, toward the body, of a tool engaging the thread of said outlet nipple and prevent such tool from becoming wedged onto the body during rotation thereof in applying the cock to a main.

4. A corporation stop comprising a body provided with externally threaded inlet and outlet nipples and a rotatable plug key for controlling flow through the stop, the body being provided substantially at the base of the outlet nipple with two diametrically opposite abutment lugs adapted to limit movement, toward the body, of a tool engaging the thread of said outlet nipple and prevent such tool from becoming wedged onto the body during rotation thereof in applying the cock to the main.

In testimony whereof I hereunto set my hand.

WILLIAM J. MIX; 

